Did NOT fix the same issue with my Photosmart 7525. I have set a static IP outside the router's DHCP range. I have set the router to only use the 2.4 MHz radio (and also tried the 5 MHz). I have disabled "auto off" and set sleep time interval to maximum (15 min). I even turned off IPv6. NOTHING solves this problem. When the printer goes into sleep mode after 15 minutes, it loses the network connection to the router. Even tried two different routers. After sleeping, the printer must be either power cycled or reconnected to network using the wireless setup wizard. The printer works fine until it sits idle for 15 min. I've timed it, and can print after 12 minutes, but not after 18 min. Clearly this is a printer firmware issue. And clearly I'm not alone. Very disgruntled customer - soon to be former customer.
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